Can't tell if you're being serious, but if you have an '05 and haven't had the top replaced with an old frame and plastic (flexible) window, then it's glass.

On S2000s:

Rigid rear window = glass
Flexible rear window = plastic

And yes, the rear window on 2002's and newer can be tinted, and has been tinted by many owners and pro tint shops.


If you have a plastic rear window you can pick up the static cling tint that was mentioned at Wal-mart, Home Depot, and most other stores of that nature.

 

I also think that you put the static cling tint on the outside IIRC.